Improved machine for leveling streets



UNITED STATES PATENT OratoriO LOUIS VON FROBEN, OF IVSHINGTON, DISTRICT OFCOLUMBIA.

IMPROVED MACHINE FOR LEVELING* STREETS.

Specicationformiug part of Letters Patent No. 52,915, dated February 27, 11566.

To u IZ rwhom .it may concern Be it known that I, LOUIS VON FROBEN,'of the Grand Duchy otf Baden, in Germany, but residing in the city ot' IVashington, in ,the

District ot Columbia, have invented a new and useful Machine for Leveling Street-Pave ments, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference heing had to the annexed drawings, making a part ot' this specification, and tothe let ters and 1i gares-ot' reference marked thereon.

V The objectI of my invention is to construct a machine by which Streetpavements may -he leveled by animal or steam power in the place 'and stead of the hand-ram heretofore in use.

To this end I construct a carriage on wheels, as represented in the d a-wings, to be drawn along the pavement either by steam or animal power, and provided with oneor more trip-hammers, as may be most desirable. It' Iv desire to use one hammer only I construct the carriage with two large and two Small wheels, as shown in Figure l; but it' I desire to use two hammers I construct it with fou large wheels, as shown in Fig. 2'.

I may add to the number of hammers in use Vby adding to the number of wheels, axles, and, gearing in the carriage-frame. Y'

lhe large wheels ofthe carriage are secured firmly to the axle of the carriage, and with which they revolve.

In the center ot' the axle I attach a cogwheelj (Marked A.) It may be moved sidewise on said axle, and thereby the'machinery be thrown out of gear, by removing the' bolt b, by which itis fastened to the axle.

" u G are wheels. on shaft E, axed one on veac-h side of cog-wheel F. These wheels 'have cogs on their peripheries,respectively, covering abont-onethird part thereof, more or less,

which cogs mesh with the cogs oa the ratchets of thc trip-hammer, as hereinafter described.

Letter II is a trip-hammer, which moves up and down in slots or groovesplaced upright on the inside ofthe body ofthe carriage, as shown 'at1{. The face of this trip-hammer is usually made of wrought iron or steel to give it durability and strength, or, as is preferable, I make theinside thereot'ot' wood, and surround it with a strong wrought-iron ring. Ihe hammer itselt'is constructed of lirm and heavy materials,

for the reason that the work is performed by its weight alone when falling upon the pavin g-stones. Ithas ratchets marked M, in which the cogs on the wheels G G mesh, 'and' vby which it is lifted in the grooves or slotsabove mentioned.

Letter O is a slotted pendant hanging' upon a rod, I), to which `it is connected by a. setscrew, and extending down each side ot' the cog-wheel A. Its otiice is to guide said cogwheel while in gear, and to keep it out ot'gear when I desire to do so.

The machine, as shown in the drawings, represents the hammer in the rear ot' the axle.

It is sometimes desirable to have the hammer..

on the front end of the carriage. In that case I interpose'a shaft and cog-wheel between the double-cog wheel l) and thecog-whecl F, meshing with both, and thereby reversing the n10- tion ot' cogwheel F and wheels Gr G. Fig. 4

of the drawings represents this additional shaft and wheel.

Letter S is a pawl-and-ratchet wheel, whose oiice is to hold the hammer suspended in its `grooves when the machine is out ot' gear or not at work.

The mode of operating my said machine is as follows, namely: Place the wheels in gear and secure them in that position byplacing the pend,

ant O immediately over the cog-wheel A, with its sides extending down each side thereof, and also by placing the bolt b in its proper position. Connect the motive power with the carriage at its forward end, and the work commences. The various cog-wheels meshA with each other as the main wheels and axle revolve, and the wheels G, working in the ratchets ofthe hannner, raise it until the cogs in said wheels have all passed through the eogs on the ratchets, when the hammer falls. When I deslre tol move the carriage without working the hammer I throw inout of gear by emnving' the boh: b und sliding the cogewheel A sidewise onthe axle, and securing it, when I \vish,b ylnem1s of the pendant; and setserew above described. 'I That I claim as lnyinvention, and desire to'secure by Letters Patent, is-

The combination und arrangement. of the cog-wheels A, D, F, and G G, bolt b, and triphmnmer H, und the shafts C' and E with the pnwl undmatchet S, substantially as and for the purposes herein speeied.

` LOUIS VON FROBEN.

Witnesses:`

J. CLEMENT SMITH, JOHN I. JACOBS.V

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